Question 3 - Examples - Chapter 8 Class 10 Introduction to Trignometry

Last updated at August 2, 2026 by

Example 11 - Express cot 85 + cos 75 in terms of ratios - Examples

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Question 3 Express cot 85° + cos 75° in terms of trigonometric ratios of angles between 0° and 45°. cot 85° + cos75° = cot (90° − 5) + cos (90° − 15°) = tan 5° + sin 15° Hence required value is tan 5° + sin 15°

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